parsing xml file with qtxml c++ - c++

Question

i'm just trying to parse an xml file using QtXml lib , so i need some help b'cause i don't understand how it's work :$
so this is my xml file config.xml :
<configuration>
<user>
<foo>Something</foo>
<bar>Something too</bar>
</user>
<dll_version>
<v1>appv1</v1>
<v2>appv2</v2>
<v3>appv3</v3>
</dll_version>
</configuration>
note : dll version it's a function that get version of an app from reg and compare it to value in xml file .
what i want to do :
Create function like : GetConfValue(QString conftype, QString confname)
that return the Config Value example : GetConfValue("user", "foo") return "Something"
thanks :)

Answer 1

Once in past, I also needed similar functionality. I used code as below. This may not be best solution, but i worked for me.
QString GetConfValue(QString conftype, QString confname) {
QString ret = "";
QFile file("config.xml");
if (file.open(QFile::ReadOnly | QFile::Text)) {
QXmlStreamReader reader;
reader.setDevice(&file); //(file);
reader.readNext();
while (!reader.atEnd()) {
if (reader.name() == "configuration" && reader.isStartElement()) {
reader.readNext();
while (!reader.atEnd()) {
if (reader.name() == conftype && reader.isStartElement()) {
reader.readNext();
while (!reader.atEnd()) {
if (reader.name() == confname && reader.isStartElement())
return reader.readElementText();
reader.readNext();
}
}
reader.readNext();
}
}
reader.readNext();
}
} else
qDebug() << qPrintable(file.errorString());
return ret;
}